A GREAT observation of someone! And how oftentimes people are part of our lives, without … communication … touch … etc! However, they are THERE and when they “disappear”, we miss them! I like this poem! Makes me think of someone who walks his dog in the park while I take my walk. We rarely rarely talk, and when we do it is in passing, and it’s about the weather, and/or his dog… but I know I miss him when he isn’t there, i.e., he’s part of the environment, my “background” for me!